<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true" >添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger"  icon="el-icon-delete"  @click="removeUserById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

     <!-- 添加角色的对话框 -->
     <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName "></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc "></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>

    
    <!--修改角色信息的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px" >
      <el-form-item label="角色 ID" >
      <el-input v-model="editForm.roleId" disabled></el-input>
      </el-form-item>
      <el-form-item label="角色名称" prop="roleName">
      <el-input v-model="editForm.roleName" ></el-input>
      </el-form-item>
      <el-form-item label="角色描述" prop="roleDesc" >
      <el-input v-model="editForm.roleDesc" ></el-input>
      </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
      <el-button @click="editDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="editRolesInfo">确 定</el-button>
      </span>
      </el-dialog>
    

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件   show-checkbox：可选择  node-key:树节点唯一标识  default-expand-all：默认展开所有节点  default-checked-keys：默认勾选的节点的key数组-->
      <el-tree 
      :data="rightslist" 
      :props="treeProps" 
      show-checkbox 
      node-key="id" 
      default-expand-all 
      :default-checked-keys="defKeys" 
      ref="treeRef">
    </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="assignRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],

      //添加角色的表单数据
      addForm: {
      roleName:'',
      roleDesc:''
      },

      // 所有权限的数据
      rightslist: [],

      //查询到的角色信息对象
      editForm:{
        roleId:'',
        roleName:'',
        roleDesc:''
      },
      // 控制添加角色对话框的显示与隐藏
       addDialogVisible: false,

      //控制修改用户对话框的显示与隐藏
      editDialogVisible:false,
    
     // 添加表单的验证规则对象
     addFormRules: {
      roleName :[ {required: true,  message: '请输入角色名称', trigger: 'blur'} ],
      roleDesc :[ {required: false, message: '请输入角色描述', trigger: 'blur'} ]
      },

      // 修改表单的验证规则对象
      editFormRules: {
        roleName :  [ {required: true,  message: '请输入角色名称', trigger: 'blur'} ],
        roleDesc :  [ {required: false, message: '请输入角色描述', trigger: 'blur'} ] 
      },
      
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
   
      // 树形控件的属性绑定对象
      treeProps: {
        //label：看到的文本是哪个数据字段
        label: 'authName',
        //children：实现父子节点嵌套用的哪个属性
        children: 'children'
      },

      // 默认选中的节点Id值数组
      defKeys: [],
      
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
      // 获取所有角色的列表
      async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },

      // 监听添加用户对话框的关闭事件
      addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },

       // 点击按钮，添加角色
       addRoles() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求,请求方法：post   请求路径：roles  请求参数：addForm
        const { data: res } = await this.$http.post('roles', this.addForm)

        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败！')
        }
        this.$message.success('添加角色成功！')
        // 隐藏添加角色的对话框
        this.addDialogVisible = false
        // 重新获取角色列表数据
        this.getRolesList()
      })
    },
    
      // 展示编辑角色的对话框
      async showEditDialog(id) {
      // console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },

      // 监听修改用户对话框的关闭事件
      editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },

     // 修改角色信息并提交
     editRolesInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改角色信息的数据请求
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败！')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功！')
      })
    },
    
    //根据id删除对应的角色信息
          async removeUserById(id){
          //console.log(id)
          //询问角色是否删除
          const confirmResult= await this.$confirm ('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>{
          return err
        })
      //只有一行语句可以简写为catch(err=>err)
       //console.log(confirmResult)点击确认打印confirm ,点击取消打印cancel
      if(confirmResult!=='confirm'){
        return this.$message.info('已取消删除')
      }
      //console.log('已确认删除')
      const {data:res} = await this.$http.delete('roles/'+id)
      if(res.meta.status!==200){
        return  this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功！')
      this.getRolesList()
    },

    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        { confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      // this.getRolesList()
      role.children = res.data
    },

    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data
      console.log(this.rightslist)
      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      //循环当前node中所有数组，每循环一项拿到一个子节点item，再次调用递归函数，
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },

    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },

    // 点击确定按钮为角色分配权限
    async assignRights() {
      const keys = [
        //...展开运算符,将一个数组转为用逗号分隔的参数序列
        //获取已选中节点的id值
        ...this.$refs.treeRef.getCheckedKeys(),
        //获取半选中节点的id值
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //拼接
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }

  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
